Mechanical movement



July 4, 1950 TALBOT 2,513,758

MECHANICAL MOVEMENT Filed July 2, 1947 29 3 as He 2 FIG 3 F. 14. 77: LB 0 T.

INVENTOR BY flo 02-43-14 ATTORNEY.

Patented July 4, 1950 UNITED STATES PATENT OFFlCE.

MECHANICAL MOVEMENT Frank A. Talbot, Baltimore, Md., assignor of onehalf to Robert E. Barry, Washington, D. 0.

Application July 2, 1947, Serial No. 758,603

I 11 Claims. 1

This invention relates to improvements in mechanical movements, and more particularly to means for converting rotary motion into reciprocating motion.

The primary object of the invention is to provide improved. means for reciprocating the pistons of a pump from a rotary shaft without imparting end-thrust from, the pistons to the shaft. I

Another object is to supply a mechanical movement for converting rotary motion into reciprocating motion and including means for varying the stroke of the part or parts reciprocated.

Another object is to supply a high pressure pump of the type disclosed in my Patent No. 2,365,309 with readily controlled means for varying the stroke of the pistons or reversing the sequence of movement thereof.

A still further object is to provide a mechanical movement for converting rotary motion to reciprocating motion and including novel motion varying and reversing means.

A further object is to provide novel means for lubricating the mechanism.

Withe the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features hereinafter described in. de-

tail, illustrated in the accompanying drawing,

and more particularly pointed out in the appended claims:

In the drawing:

Fig. 1 is a longitudinal sectional view of a high pressure pump of the type disclosed in my above-mentioned patent and showing my improved mechanical movement, and with parts of the mechanical movement set for maximum discharge by the pump.

Fig. 2 is a. side elevation of parts of the mechanical movement with the piston thrust ring set in neutral or no discharge position.

Fig. 3 is a side elevation of the wedge ring forming part of the mechanical movement.

Referring to the drawing; 4 designates the high pressure pump casing having a fluid inlet 5 and a fluid discharge conduit 6. The pump has a series of parallel cylinders I in which valved pistons 8a reciprocate, and one end of each cylinder is provided with an inlet port 8, and the opposite end is provided with a valve controlled discharge port 9. Between the inlet Eand the ports 8, there is a chamber ID in which an impeller wheel ll is arranged, for forcing fluid from the inlet 5.-into the: inlet ports 8 of the 2 cylinders I. The impeller is driven by a rotary shaft I2 which is employed to rock a thrust member or ring I3, to which the pistons are operatively connected. All of these parts are substantially in accordance with the pump illustrated in Patent 2,365,309, and with the same I employ my novel mechanical movement. In accordance with the present invention, a housing sleeve I4 is connected to one face of the pump casing 4 by any suitable means, such as screws t5, and the sleeve is employed to clamp a bear ing plate IE to the casing. Said plate has parallel guide apertures I! for the pistons, and a journal I8 for the shaft. Said plate is also provided with a, spheroidal seat I9 to receive a complementary projection or dome 20 of the thrust ring I3 which ring, in accordance with the present invention, is provided with peripheral gear teeth 2| meshing with internal gear teeth 22 of the housing sleeve I4.

In keeping with the present invention, a wedge-shaped ring 23 is provided with diamet rical apertures 24, and a central orifice 25. The shaft I2 passes throughv the hole 25, and a pin 2e extends through the shaft and into the apertures 2 4 to (plVOtEtllY connect the wedge ring to the shaft. One face of the wedge ring slidably engages the thrust member I3 so that the latter is rocked to reciprocate the pistons.

A second rockable ring or member 2'! surrounds the shaft I2 and engages the. opposite face of the wedge ring 23, and the ring 2'! has a spheroidal projection 28 at one side thereof to rockably engage a complementary seat 29 of the housing end plate 30, secured to a flange SI of the sleeve I4 by screws 32, or the like.

The ring 21 is also provided with peripheral gear teeth 33 meshing with the internal teeth 22 of the sleeve.

A cam ring 34 having cams 35 bears against the rim portion of the rockable ring 21 for the purpose of adjusting the latter, that is, to vary the angularity of the face 36 of the rockable member 21 so as to change the angularity of the wedge ring 23 with reference to the axis of the shaft. The cam ring 34 is also provided with peripheral teeth 31 meshing with the teeth 22 of the sleeve I4, and at this point it may be stated that all of the teeth H, 33 and 31 are preferably ellipsoidal to facilitate rocking of the members- I3 and 21 and to prevent rotation of these members and of the cam ring 34 The cam ring 34 is moved axially of the shaft by means of an oscil latable cam ring38 having cam surfaces 39 cooperating with the cams 35. Both cam rings bear upon the cylindrical surface 40 of the end plate 30 which is provided with a central bearing 4| for the shaft.

Cam ring 38 has an actuating member 42 controlled in any suitable way to vary the position of the .parts so that the pistons during the rotation of the impeller shaft may be moved from neutral to maximum stroke or have their stroke varied anywhere between these two points.

For lubricating purposes, the housing end plate 30 is preferably provided with a plug-receiving hole 43 to permit the introduction of lubricant into the housing through aperture 43a, and the wedge ring 23 is provided with an aperture or passageway 44 preferably arranged parallel to the hole 24. Ferrules 4'5 extend into the ends of the aperture M and project beyond the periphery of the wedge ring to function as scoops to move lubricating oil from the interior of the sleeve into the interior of the parts i3, 23, 21, etc., and a ball valve 46 is arranged to roll in the passageway M and cooperate with the inner end of either of the ferrules to close communication through that ferrule, depending on the direction of rotation of the wedge ring.- At

this point, it will be noted that the impeller tional through the pump, that is from intake 5,

through ports 8, past valved pistons 8a, through discharge ports 9, and the discharge conduit 6. Regardless of the directionv of rotation of the impeller shaft, the stroke of the pistons may be varied from to maximum by adjusting or turning the calm ring 38. When that ring is turned, its cam surfaces will cause the cams 35 of the cam ring 34' to move the latter axially of the shaft, and as the ring 3Q cannot turn and it bears against the rim of ring Z'Lthe latter is caused to rock. Hence,-the wedge ring is also caused to rock aboutthe pivot pin 26 with the result that the ring I3 partakes of the rocking movement to vary the stroke of the pistons 811. As the spheroidal projection 28'of the ring 21 engages the spheroidal seat 29, it is obvious that any end thrust of the pistons will be borne by the plate 30 and will not be imparted to the impeller shaft. Consequently, the impeller Will always remain in an operative position and the impeller will not tend to rubagainst the suriacesof the chamber in which it rotates. a 7

From the foregoing, it is believed that the construction of the mechanical inovemenflthe operation and advantages thereof may be readily understood, and it is evident that changes may be made in the details disclosedwithout' departing from the spirit of the invention, as expressed in the following claims:

What I claim and desire to secure by Letters Patent is:

1. In mechanism of the character described.

a stationary housing, a pair of rockable thrust rings arranged in the housing, means operatively connecting the rings and housing to prevent the rings from rotating, one of said rings having a spheroidal surface at one side thereof, said housing having a spheroidal seat against which the spheroidal surface of the ring bears, a rotatable wedge ring arranged between and operatively engaging said thrust rings, a rotatable shaft extending through one of said thrust rings and pivotally connected to the wedge ring to permit the latter to turn about an axis intersectdicularly thereto, and a reciprocating member operatively connected to one of the thrust rings and actuated thereby.

2. In mechanism of the character described, a stationary housing, a pair of thrust rings rockably arranged in the housing, means operatively connecting the rings and housing to prevent the rings from rotating, each of said rings having a spheroidal surface at one side thereof, said housing having spheroidal seats against which the spheroidal surfaces of the rings bear, a rotatable wedge ring positioned between the thrust rings and operatively engaging the opposite sides thereof, a rotatable shaft extending through one of said thrust rings and pivotally connected to the wedge ring to permit the latter to turn about an axis intersecting the axis of the shaft and positioned perpendicularly thereto, and a reciprocating member driven by one of said thrust rings.

3. In mechanism of the character described, a housing, a pair of rockable thrust members arranged in the housing, one of said members being of ring shape, means operatively connecting the thrust members and housing to prevent said members from rotating relatively to said housing, one of said members having a spheroidal surface at one side thereof, said housing having a sphe roidal surface at one side thereof, said housing having a spheroidal seat against which the spheroidal surface bears, a rotatable wedge ring" art'- ranged between and slidably engaging said thrust members, a rotatable driving shaft for the wedge ring extending through the ring-shaped thrust member and pivotally connected to the wedge ring to permit the latter to' turn about an axis intersecting the axis of the shaft and positioned perpendicularly thereto, and at least one reciprocating member driven by one of saidthrust members.

4. In mechanism of the character described, housing provided with internal gear teeth, "a pair, of rockable thrust membersarranged in the hous ing and having peripheral teeth engaging the teeth of the housing to prevent the thrust mem bers from rotating relatively to the housing, one of said members having a spheroidal surface at one side thereof, said housing having a sphe roidal seat against which the spheroidal surface bears, a reciprocating element driven by the other member, a rotatable wedge ring arranged between and operatively engaging the thrust members, and a rotatable shaft extending through one of said thrust members and pivotally connected to the wedge ring to permit the latter to turn about an axis intersecting the axis of the shaft and positioned perpendicularly thereto.

5. A mechanism as claimed in claim 1 including control means operatively connected, to one of the thrust rings for rocking the same with reference to the pivotal axis of the wedge ring.

6. A mechanism asclaimed in claim 3,,includ ing control means operatively connected toone of the thrust members for moving a peripheral portion thereof toward. the wedge ring '7. In mechanism of the character described, a housing provided with internal gear teeth, a pair of rockable thrust members arranged in the housing and having peripheral teeth engaging the. teeth of the housing to prevent the thrust members from rotating relativel to the housing, one of said members having a spheroidal surface at one side thereof, said housing having a spheroidal seat against which the spheroidal surface ing the axis of the shaft and positioned perpenbears, a reciprocating element driven by the other member, a rotatable wedge ring arranged between and operatively engaging the thrust mem-- ber,faj rotatable shaft extending through one of saidthrust members and pivotally connected to the Wedge ring to permit the latter to turn about positioned perpendicularly thereto, a cam ring having peripheral teeth meshing with the teeth of. the housing to prevent the cam ring from rotating relatively to the housing, and a second cam ring operatively connected to the first-mentioned cam ring for moving the latter axially of said shaft, the first-mentioned cam ring being operatively connected to one of the thrust members for moving a peripheral portion of the same toward the wedge ring. I

8. -In mechanism of the character described, a housing, a pair of thrust members arranged in the housing, means operatively connecting the thrust members and housing to prevent said members from rotating relatively to the housing, one of said members having a spheroidal surface at one side thereof, said housing having a spheroidal seat against which said spheroidal surface bears, a plurality of reciprocating members operatively connected to and operated by the other one of said members, a rotatable wedge ring arranged between and operatively engaging said thrust members, and a rotatable driving shaft for the wedge ring extending through the ring and thrust members and pivotally connected to the wedge ring to permit the latter to turn about an axis intersecting the axis of the shaft and positioned perpendicularly thereto.

ing therethrough and provided with scoops at the ends thereof, said passageway communicating with the interior of the ring, and valve means arranged in said passageway for closing either end thereof depending on the direction of rotation of the wedge ring.

11. A mechanism of the character described, comprising a housing, a pair of rockable thrust member-s arranged in the housing, means operatively connecting the members and housing to prevent the members from rotating relatively to the housing, said members having spheroidal surfaces at opposite sides thereof, said housing having spheroidal seats against which the spheroidal surfaces bear, a rotatable wedge ring positioned between the opposite sides of said members and operatively engaging the latter, a r0- tatable drive shaft for the wedge ring, extending through one of said thrust members and pivotally connected to the wedge ring to permit the latter to turn about an axis intersecting the axis of the shaft and positioned perpendicularly thereto, a series of reciprocating members operatively connected to one of the thrust members and actuated thereby, and control means operatively connected to the other one of the thrust members for moving a peripheral portion there of toward the wedge ring,

FRANK A. TALBOT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,419,681 Martin June 13, 1922 2,337,821 Huber Dec. 28, 1943 2,385,990 Huber Oct. 2, 1945 

